code: def test_serving_identity(self):
      data = {"a": "b"}
      self._test_serving(data_in=data, expected_data_out=data)
  
file_path: studio/tests/serving_test.py
imports: import unittest
  import subprocess
  import time
  from random import randint
  import os
  import uuid
  import requests
  from studio import model
  from env_detect import on_gcp
label_desc: Use image node_id 2 for calling the ServingTest obj's underlying member method code with example usage: obj.test_serving_identity() without return types